Current word is all UK airports will be closed to departures anytime now.
http://news.bbc.co.uk/1/hi/uk/8621407.stm /
http://www.britishairways.com/travel...b?p_faqid=4002
Interestingly, for LHR -> YYZ BA has stopped selling fares for Friday's flights but Air Canada still has Tango+ fares. I wonder if that will change as North America wakes up.
Good luck making it back, I am supposed to be on a YYZ bound flight tomorrow, hence my initial interest.
Cheers.